function area_of_circle(){
    var basketball ='这可能是一个篮球'
    function say(){
        var basketball ='这是足球'
        console.log(basketball);
    }
    say()
}
area_of_circle();

console.log('变量提升');
var aa='堑智'

function area_of_circles(){
    console.log(x);
    var y='智';
    var x='堑-'+y
    console.log(x);
}
area_of_circles();

var myhome ={}

myhome.printf=function(){
    console.log('我是base文件里的printf');
}

var xiaoguozi={}

xiaoguozi.printf=function(){
    console.log('我是car文件里的printf');
}

var myhome={}
let abd='11111111111'

myhome.printf=function(){
    console.log('循环效果');
    for (let i = 0; i<10; i++) {
      console.log(i);
       
    }
    console.log('循环完成以后，其计算器i仍然有效${i}');
}